CVE-2020-29373
Published: 28 November 2020
An issue was discovered in fs/io_uring.c in the Linux kernel before 5.6. It unsafely handles the root directory during path lookups, and thus a process inside a mount namespace can escape to unintended filesystem locations, aka CID-ff002b30181d.
Notes
Author | Note |
---|---|
cascardo | using the commit that introduced io_uring, though the earlier commit would be one that introduces io_uring sendmsg support. However, any other commits introducing other operations would be vulnerable. |
Priority
Status
Package | Release | Status |
---|---|---|
linux Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.13.0-16.19)
|
focal |
Not vulnerable
(5.4.0-18.22)
|
|
groovy |
Not vulnerable
(5.4.0-26.30)
|
|
trusty |
Ignored
(was needs-triage ESM criteria)
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Not vulnerable
(4.2.0-16.19)
|
|
Patches: Introduced by 2b188cc1bb857a9d4701ae59aa7768b5124e262e |
||
linux-aws Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1001.1)
|
focal |
Not vulnerable
(5.4.0-1005.5)
|
|
groovy |
Not vulnerable
(5.4.0-1009.9)
|
|
trusty |
Ignored
(was needs-triage ESM criteria)
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Not vulnerable
(4.4.0-1001.10)
|
|
linux-aws-5.0 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-aws-5.3)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
trusty |
Does not exist
|
|
linux-aws-5.3 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-aws-5.4)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-aws-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1018.18~18.04.1)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-aws-hwe Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Not vulnerable
(4.15.0-1030.31~16.04.1)
|
|
linux-azure Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-azure-5.3)
|
focal |
Not vulnerable
(5.4.0-1006.6)
|
|
groovy |
Not vulnerable
(5.4.0-1010.10)
|
|
trusty |
Ignored
(was needs-triage ESM criteria)
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Not vulnerable
(4.11.0-1009.9)
|
|
linux-azure-4.15 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1082.92)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-azure-5.3 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-azure-5.4)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-azure-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1020.20~18.04.1)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-azure-5.3)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-dell300x Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1005.8)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-gcp Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-gcp-5.3)
|
focal |
Not vulnerable
(5.4.0-1005.5)
|
|
groovy |
Not vulnerable
(5.4.0-1009.9)
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Not vulnerable
(4.10.0-1004.4)
|
|
trusty |
Does not exist
|
|
linux-gcp-4.15 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1071.81)
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
focal |
Does not exist
|
|
linux-gcp-5.3 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-gcp-5.4)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-gcp-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1019.19~18.04.2)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-gcp-edge Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-gcp-5.3)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-gke-4.15 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needed)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-gke-5.0 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of standard support, was needed)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-gke-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1018.19~18.04.1)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-gke-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1025.25~18.04.1)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-gkeop Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Not vulnerable
(5.4.0-1008.9)
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-gkeop-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1001.1)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-hwe Launchpad, Ubuntu, Debian |
bionic |
Ignored
(replaced by linux-hwe-5.4)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Not vulnerable
(4.8.0-36.36~16.04.1)
|
|
linux-hwe-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-37.41~18.04.1)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-hwe-5.8 Launchpad, Ubuntu, Debian |
focal |
Not vulnerable
(5.8.0-23.24~20.04.1)
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
bionic |
Does not exist
|
|
groovy |
Does not exist
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-hwe-5.4)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Ignored
(superseded by linux-hwe)
|
|
linux-kvm Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1002.2)
|
focal |
Not vulnerable
(5.4.0-1004.4)
|
|
groovy |
Not vulnerable
(5.4.0-1009.9)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Not vulnerable
(4.4.0-1004.9)
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Ignored
(was needs-triage ESM criteria)
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-oem Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Ignored
(end of standard support)
|
|
linux-oem-5.10 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Not vulnerable
(5.10.0-1008.9)
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-oem-5.6 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Not vulnerable
(5.6.0-1007.7)
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-oem-osp1 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of standard support, was needs-triage)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-oracle Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1007.9)
|
focal |
Not vulnerable
(5.4.0-1005.5)
|
|
groovy |
Not vulnerable
(5.4.0-1009.9)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Not vulnerable
(4.15.0-1007.9~16.04.1)
|
|
linux-oracle-5.0 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-oracle-5.3)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-oracle-5.3 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-oracle-5.4)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-oracle-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1019.19~18.04.1)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-raspi Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Not vulnerable
(5.4.0-1007.7)
|
|
groovy |
Not vulnerable
(5.4.0-1008.8)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-raspi-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1013.13~18.04.1)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
trusty |
Does not exist
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.13.0-1005.5)
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Not vulnerable
(4.2.0-1013.19)
|
|
focal |
Ignored
(replaced by linux-raspi)
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
linux-raspi2-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1023.25~18.04.1)
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
linux-riscv Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Ignored
(end of life, was needed)
|
|
groovy |
Not vulnerable
(5.4.0-24.28)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Does not exist
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.4.0-1077.82)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc2)
|
|
xenial |
Not vulnerable
(4.4.0-1013.15)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.5 |
Attack vector | Local |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Changed |
Confidentiality | High |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-29373
- https://git.kernel.org/linus/ff002b30181d30cdfbca316dadd099c3ca0d739c
- https://bugs.chromium.org/p/project-zero/issues/detail?id=2011
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ff002b30181d30cdfbca316dadd099c3ca0d739c
- NVD
- Launchpad
- Debian